Thank you. I finally plucked up the courage to take her out of her carrier and put her on the grass next to him. He groomed her but then he realised she wasn't going to wake up and left her so I've brought her back in and she'll go to be cremated tomorrow.
I'm in absolute shock I think, the anger is fading now but the vet nurse said to me 'well 5 is a good age for a rabbit' and I shouted at him.